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首页> 外文期刊>Aquatic Sciences >Living a century in warm thermal conditions: introduced populations of Pumpkinseed (Lepomis gibbosus) inhabiting the Iberian Peninsula (Spain) show reduced adaptation to North American winter conditions
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Living a century in warm thermal conditions: introduced populations of Pumpkinseed (Lepomis gibbosus) inhabiting the Iberian Peninsula (Spain) show reduced adaptation to North American winter conditions

机译：在温暖的高温条件下生活一个世纪：居住在伊比利亚半岛（西班牙）的南瓜子（Lepomis gibbosus）的引进种群对北美冬季条件的适应性降低

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摘要

In this study, we demonstrate that non-native Pumpkinseed (Lepomis gibbosus) introduced into Spanish water-bodies almost 100 years ago have a reduced capacity to tolerate winter conditions typically experienced by northern native populations. Overwinter survival and changes in lean weight and lipid content of Pumpkinseed from artificial colonies established from two Canadian and two Iberian source populations were compared under winter conditions typically experienced in the northern native range. Adult survival in outdoor ponds was higher in Canadian populations (68 and 78 %) than Iberian populations (31 and 49 %). Under simulated winter conditions in the laboratory, juvenile Iberian Pumpkinseed experienced higher mortality earlier in the winter period than Canadian populations. Lipid content of Iberian juveniles decreased on average by 49 % during the first half of the winter, while that of Canadian populations decreased by only 12-20 %. These results indicate that Iberian Pumpkinseed have lower tolerance of winter conditions relative to native Canadian populations, and suggest that relatively short exposure to warm climates can result in adaptive change in the physiology and bioenergetics of wild fish populations.
机译：在这项研究中，我们证明了将近100年前引入西班牙水域的非本地南瓜籽（Lepomis gibbosus）耐受北方土著人口通常经历的冬季条件的能力降低。在北部土著地区通常经历的冬季条件下，比较了来自两个加拿大和两个伊比利亚来源种群建立的人工菌落的南瓜籽的越冬存活率以及瘦体重和脂质含量的变化。加拿大人口（68％和78％）在室外池塘中的成年存活率高于伊比利亚人口（31％和49％）。在实验室模拟的冬季条件下，幼年伊比利亚南瓜籽的冬季死亡率要比加拿大高。伊比利亚幼鱼的脂质含量在冬季的上半年平均下降了49％，而加拿大人口的脂质含量仅下降了12-20％。这些结果表明，相对于加拿大本地种群，伊比利亚南瓜籽对冬季条件的耐受性较低，并且表明相对短的暴露于温暖的气候会导致野生鱼类种群的生理和生物能适应性变化。

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  • 来源
    《Aquatic Sciences》 |2014年第4期|497-509|共13页
  • 作者

    Anna C. Rooke; Michael G. Fox;

  • 作者单位

    Environmental and Life Sciences Graduate Program, Trent University, Peterborough, ON K9J 7B8, Canada;

    Environmental and Resource Studies Program, Department of Biology, Trent University, Peterborough, ON K9J 7B8, Canada;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Adaptation; Climate; Non-native; Starvation; Winter; Lepomis gibbosus;

    机译：适应;气候;非本地饥饿;冬季;吉尾油菜;

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